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P1698 RAM Code - PCM Fault No CCD Message From TCM

Quick Answer

The P1698 diagnostic trouble code (DTC) indicates a communication failure between the Powertrain Control Module (PCM) and the Transmission Control Module (TCM) in the vehicle. Common causes include Faulty PCM or TCM, Damaged wiring or connectors in the CCD bus system, Software issues in the PCM or TCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1698 RAM indicates PCM Fault No CCD Message From TCM.
Common causes
Common causes include Faulty PCM or TCM, Damaged wiring or connectors in the CCD bus system, Software issues in the PCM or TCM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1698 RAM Description

The P1698 diagnostic trouble code (DTC) indicates a communication failure between the Powertrain Control Module (PCM) and the Transmission Control Module (TCM) in the vehicle. The PCM is responsible for managing various engine functions, while the TCM controls the transmission system. When the PCM detects that no messages are being exchanged between itself and the TCM over the Chrysler Collision Detection (CCD) bus, it triggers the P1698 code.

OBDII Code P1698 RAM - PCM Fault No CCD Message From TCM
P1698 RAM Code - PCM Fault No CCD Message From TCM

Common Causes of P1698 RAM

  1. Faulty PCM or TCM
  2. Damaged wiring or connectors in the CCD bus system
  3. Software issues in the PCM or TCM
  4. Corrosion or moisture in the communication circuit
  5. Electrical interference from aftermarket accessories

Symptoms of P1698 RAM

  1. Erratic shifting behavior
  2. Transmission slipping
  3. Check Engine Light illuminated
  4. Reduced fuel efficiency
  5. Vehicle stuck in limp mode

How to Fix P1698 RAM

  1. Diagnose the exact cause of the communication failure by using a scan tool to retrieve specific fault codes and perform electrical testing.
  2. Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Check for software updates for the PCM and TCM. Perform reprogramming if required.
  4. If the PCM or TCM is determined to be faulty, replace the affected module with a new or remanufactured unit.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1698 RAM

The cost of repairing a P1698 code can vary depending on the root cause of the issue and the labor rates in your area. Typically, replacing a faulty PCM or TCM can range from $500 to $1000, including parts and labor. However, additional costs may apply if wiring repairs or software updates are necessary. It's recommended to consult with a professional mechanic for an accurate estimate based on your specific vehicle make and model.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1698 RAM Code

1. What does OBDII code P1698 RAM mean?

The OBDII code P1698 RAM signifies a PCM Fault - No CCD Message From TCM, indicating a communication error between the powertrain control module (PCM) and the transmission control module (TCM).

2. What are common symptoms of OBDII code P1698 RAM?

Common symptoms of code P1698 RAM include transmission shifting issues, engine stalling, hesitation during acceleration, and the illumination of the Check Engine Light.

3. What are possible causes of OBDII code P1698 RAM?

Possible causes of code P1698 RAM include faulty wiring or connections between the PCM and TCM, a defective TCM, a malfunctioning PCM, or issues with the Controller Area Network (CAN) bus communication system.

4. How can I diagnose OBDII code P1698 RAM?

Diagnosing code P1698 RAM involves using a diagnostic scanner to retrieve the fault code, checking the wiring and connections between the PCM and TCM, testing the TCM and PCM for proper functionality, and inspecting the CAN bus network for faults.

5. How can I repair OBDII code P1698 RAM?

To repair code P1698 RAM, you may need to repair or replace damaged wiring, connectors, or modules between the PCM and TCM, reprogram the modules if necessary, or replace a faulty TCM or PCM as needed.

6. Can I drive my vehicle with OBDII code P1698 RAM?

It is not recommended to drive your vehicle with code P1698 RAM as it can lead to potential transmission and engine performance issues. It's best to address the problem promptly to avoid further damage.

7. Will resetting the trouble codes fix OBDII code P1698 RAM?

Simply resetting the trouble codes may temporarily clear the Check Engine Light, but it will not fix the underlying issue causing code P1698 RAM. Proper diagnosis and repair are necessary to resolve the problem.

8. How much does it cost to repair OBDII code P1698 RAM?

The cost to repair code P1698 RAM can vary depending on the specific cause of the issue, labor rates in your area, and the cost of any replacement parts needed. It's advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P1698 RAM?

While some DIY enthusiasts may have the skills and tools to diagnose and repair code P1698 RAM, it involves complex electrical systems and communication networks. If you're unsure, it's best to seek help from a qualified mechanic.

10. How often does OBDII code P1698 RAM occur in vehicles?

OBDII code P1698 RAM is relatively uncommon but can occur in vehicles with PCM and TCM communication issues. If you encounter this code, it's essential to address it promptly to prevent further problems with your vehicle's performance.

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